32results about How to "No bleaching" patented technology

The invention provides a liquid crystal aligning agent, a liquid crystal alignment film and a liquid crystal display element. The liquid crystal aligning agent is a solution containing polyamide acid or derivatives thereof obtained by reacting tetracarboxylic dianhydride with diamine and a solvent, and the solvent contains at least one of compounds represented by the following formula (A). By employing the liquid crystal aligning agent, viscosity chages are not liable to generate at the room temperature, when being coated, the liquid crystal aligning agent is not sunken, when be produced, the liquid crystal aligning agent is not whitened. In addition, the orientation stability of liquid crystal molecules of a liquid crystal alignment film formed by the liquid crystal aligning agent is good. Furthermore, the residual image features of a liquid crystal display element provided with the liquid crystal alignment film are excellent.

The invention provides a bar code magnetic bead liquid chip detection kit for a thalassemia gene. The detection kit comprises a PCR reagent for amplifying the thalassemia gene and a hybridization reagent for detecting the thalassemia gene; the hybridization reagent comprises a liquid chip; the liquid chip comprises a bar code magnetic bead coupled with a specificity hybridization probe, a blank bar code magnetic bead, a dissociative hybridization positive inverted-sequence probe and a hybridization buffer solution. The detection kit is simple to operate, quick in reaction, high in flux, and digitized.

The invention discloses PVC plate die forming equipment, and belongs to the technical field of PVC plate production equipment. The PVC plate die forming equipment comprises a workbench. Supports are arranged at the bottom end of the workbench, vertical beams are arranged at the top end of the workbench in a left-and-right symmetry manner, and a cross beam is arranged at the top ends of the vertical beams. During use, an upper die and a lower die are pressed to be sealed through a push rod, molten raw materials are injected into an inner cavity of the upper die and the lower die, the molten rawmaterials in the die cavity are rapidly cool-formed by injecting cooling liquid, after the molten raw materials are formed, vibratory wall separating mechanisms are started, a forming plate is separated from the inner wall of the die cavity, and therefore material ejecting is facilitated; and a vibratory material ejecting mechanism is started, an impacting plate rotary disc impacts on ejector rods, and the top ends of the ejector rods are separated from the bottom wall of the lower die and the forming plate. According to the device, through the arranged vibratory wall separating mechanisms and the arranged vibratory material ejecting mechanism, the problems such as whitening and breaking cannot be caused in the material ejecting process, and the percent of pass of finished products is effectively protected.

The invention provides a prepolymerization preparation method of a polymer matrix solid dye laser medium, relating to a preparation method of a solid dye laser medium. The preparation method solves the problems of the existing preparation method of the solid dye laser medium that the preparation period is long, the preparation process has the phenomena of layering, whitening or imploding, and the optical property of the obtained solid dye laser medium is bad. The method comprises the following steps of: refining MMA; stirring the MMA and laser dye in a mixing way to obtain laser dye solution; prepolymerizing the laser dye solution in high-temperature water batch; performing body polymerization to the prepolymerized laser dye; and annealing and mechanically machining to obtain the polymer matrix solid dye laser medium. The method firstly prepolymerizes the MMA monomer, thereby shortening induction period of polymerization, reducing volume contraction when polymerizing, shortening preparation period, and avoiding the problems of layering, whitening and imploding during preparing. The laser output slope efficiency of the solid dye medium reaches 48.57%-64.09% and fluorescence band width thereof is 44nm-46nm.

The invention relates to the technical field of garment accessory production, and particularly relates to a method for removing a laser mark of a urea-formaldehyde resin button. The method for removing the laser mark of the urea-formaldehyde resin button comprises the steps of A) polishing the urea-formaldehyde resin button after laser treatment; and B) soaking the urea-formaldehyde resin button obtained in the step A) in post-treatment liquid for a period of time, taking out the urea-formaldehyde resin button, and cleaning the urea-formaldehyde resin button to obtain a laser mark removed urea-formaldehyde resin button, wherein the post-treatment liquid comprises the following components in parts by weight: 100 parts of water; 1-15 parts of trisodium phosphate, 0.5-1 part of a surfactant,and 1-10 parts of sodium silicate. According to the removing method, LOGO on the surface of the button is not whitened, and characters are consistent with the bottom color of the button. Moreover, theurea button with the colorless LOGO can be manufactured without using a LOGO mold, the effect and the performance of the manufactured product meet the colorless requirement of a customer for the LOGO, the production cost is effectively reduced, and the production period is shortened.

The invention relates to an isocaprylic acid-3-alkoxy-2-hydroxypropyl ester film-forming auxiliary agent and a preparation method thereof. The structural expression of thefilm-forming auxiliary agent is shown in the specification, and R1 represents any one of a substituted or unsubstituted C3-C5 alkyl group, a substituted or unsubstituted C3-C5 alkenyl group and a substituted or unsubstituted C3-C5 alkynyl group. When 4 wt% of the prepared film-forming auxiliary agent is added into an emulsion with the glass transition temperature of 46 DEG C, the minimum film-forming temperature is 13-15 DEG C, a continuous and transparent coating film can be formed, excellent film-forming property is shown, and the film-forming auxiliary agent is superior to a traditional film-forming auxiliary agent. The prepared film-forming auxiliary agent has the advantages of being good in compatibility with latex, low in film forming temperature, easy to absorb by latex particles, not prone to volatilization, safe, environmentally friendly and the like, and the market application prospect is wide.

The invention discloses an amine curing agent. The amine curing agent is characterized in that the amine curing agent is the condensation of a m-xylylenediamine monomer: a formula shown in the specification. A preparation process of the amine curing agent comprises the following raw materials: m-xylylenediamine and a catalyst with a mass ratio of 100:3, wherein a structural formula of m-xylylenediamine is shown in the specification, the molecular weight of m-xylylenediamine is 136, and an amine value of m-xylylenediamine is 500-600; and the catalyst is an aluminum-nickel alloy. The preparation process comprises the following steps: I, putting m-xylylenediamine and the catalyst into a three-mouth flask, heating by using an infrared lamp to ensure that the temperature is increased to 180+/-5 DEG C, and preserving heat; II, continuously reacting, and absorbing ammonia gas which is produced in a reaction process by using a sulfuric acid solution; III, picking a sample, measuring the viscosity of the sample, and ending the reaction when the viscosity reaches 600-900CP; and IV, removing the catalyst by virtue of filtration. After being modified, the amine curing agent disclosed by the invention cannot be frozen, cannot have a whitening phenomenon, and is stable in reaction; and the preparation process disclosed by the invention is high in production efficiency, simple in required raw materials and concise in production process.

The invention discloses a manufacturing method of an anti-wearing floor of a prefabricated bathroom. The method includes the steps that the whole bathroom floor is cleaned up and dried in the air, and wax needs to be removed if the floor is waxy; a layer of UV light photocuring shadowless glue is coated on the floor evenly, and the thickness of the glue is 0.03-0.07 mm; a PVC anti-wearing surface film covers the UV light photocuring shadowless glue, extrusion is conducted until bubbles do not exist in the middle of the film so that the surface film is attached flatly; and an ultraviolet light photocuring light is used for illuminating the floor for 10-15 seconds so that the UV light photocuring shadowless glue can be solidified, and a finished product is obtained. All of the materials used in the method are colorless and transparent, and the color clarity does not reduce compared with the impression of an original surface. The anti-wearing property of the floor is tested through a GB/T18102-2007 test method, and completely meets the anti-wearing property of the business level; the floor is soaked for 24 hours in 84 disinfectant liquid, wherein the concentration of the sodium chlorate content is 620 mg/L, and no color fading and whitening phenomena happen on the surface; and by adopting the manufacturing method, the PVC anti-wearing layer can be suitable for different floors, the anti-wearing floor is suitable for industrialized batch production, and easy to be popularized in the market.

The invention belongs to an emulsion film-forming technology, and particularly relates to a film-forming aid and a preparation method thereof. The structural expression formula of the film-forming aidis shown in the specification, and R1 and R2 independently represent any one of a substituted or unsubstituted C1-C20 alkyl group, a substituted or unsubstituted C2-C20 alkenyl group, a substituted or unsubstituted C2-C20 alkynyl group and a substituted and unsubstituted C1-C20 alkoxy group. Excellent film-forming property can be realized only by adding 4wt% of the film-forming aid prepared by the invention into the emulsion, the film-forming temperature is about 14 DEG C, a transparent continuous coating can be formed and the whitening phenomenon is avoided, and the paint has good compatibility, has a boiling point of about 270 DEG C, does not cause migration of organic compounds to the surface, is not easy to volatilize, has low VOC emission, is safe and environment-friendly, and has awide market prospect.

The composition of medical adhesive includes (by weight portion) 940-970 portions of butyl cyanoacrylate, 30-60 portions of dimethyl sebacate, 0.1-0.5 portions of p-benzenediol and 0.1-0.8 portion of compound stabilizing agent, in which the described butyl cyanoacrylate is n-butyl alpha-cyanoacrylate, and the described compound stabilizing agent is made from toluene-p-sulfonic acid and dioctyl (0-) phthalate according to 90-100:0-10 weight portion. Its solidifying speed is moderate, adhesive strength is high, it is applicable to various wounds and incision of operation instead of suture needle and silk suture.

The invention discloses an instant adhesive primer and a preparation method thereof, and the preparation method comprises the following steps: in a nitrogen or argon environment, under a stirring condition, mixing fluoride, methylsiloxane and an amino compound, heating to 50-60 DEG C, adding an ionic liquid, uniformly stirring, and cooling to room temperature to obtain the instant adhesive primer, the amido compound is an organic amine-glycidyl ether adduct, and the preparation method of the amido compound comprises the following steps: stirring organic amine and glycidyl ether at 58-60 DEG C for at least 4 hours in an inert environment atmosphere, and cooling to room temperature to obtain the amido compound, the fluoride, the ionic liquid and the amino compound are matched to serve as the primer of the instant adhesive, so that the curing speed of the instant adhesive is higher, the strength and the toughness are improved, and the cured adhesive layer is free of whitening phenomenon.